Product Summary

The DS1286 Watchdog Time keeper is a self-contained real time clock, alarm, watchdog timer, and interval timer in a 28-pin JEDEC DIP package. The DS1286 contains an embedded lithium energy sourceand a quartz crystal which eliminates the need for any external circuitry. Data contained within 64 eight-bit registers can be read or written in the same manner as bytewide static RAM. Data is maintained in the Watchdog Timekeeper by intelligent control circuitry which detects the status of VCC and write protects memory when VCC is out of tolerance. The lithium energy source can maintain data and real time for over 10 years in the absence of VCC. Watchdog Timekeeper information includes hundredths of seconds,seconds, minutes, hours, day, date, month, and year. The date at the end of the month is automatically.

Parametrics

DS1286 absolute maximum ratings: (1)Voltage on Any Pin Relative to Ground: -0.3V to +7.0V; (2)Operating Temperature: 0℃ to 70℃; (3)Storage Temperature: -40℃ to +70℃; (4)Soldering Temperature: 260℃ for 10 seconds.

Features

DS1286 features: (1)Keeps track of hundredths of seconds,seconds, minutes, hours, days, date of the month, months, and years; valid leap year compensation up to 2100; (2)Watchdog timer restarts an out-of-control processor; (3)Alarm function schedules real time-related activities; (4)All registers are individually addressable via the address and data bus; (5)Accuracy is better than ±1 minute/month at 25℃; (6)50 bytes of user NV RAM.

Diagrams

DS1286 BLOCK DIAGRAM

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
DS1286
DS1286

Maxim Integrated Products

Real Time Clock

Data Sheet

Negotiable 
DS1286+
DS1286+

Maxim Integrated Products

Real Time Clock

Data Sheet

Negotiable 
DS1286I+
DS1286I+

Maxim Integrated Products

Real Time Clock

Data Sheet

Negotiable 
DS1286I
DS1286I

Maxim Integrated Products

Real Time Clock

Data Sheet

Negotiable